Gate opener

Details Gate opener Gate opener

1997-07-26

1999-02-23

Redman, Jerry

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

49340, 49 49, 74 8915, E05F 1124

Patent

active

058732004

ABSTRACT:
A 90.degree. gate opener (20) includes a screw (22), and a nut (30) which travels along screw (22) as the screw (22) is turned by a motor (46). One end of a main arm 32 is pivotally connected to nut (30) so that it also travels along screw (22). Screw (22) is dispositioned a predetermined distance (D) behind a pivot (38) which slidably receives main arm (32). As screw (22) is turned, main arm (32) rotates approximately 90.degree. about pivot (38), and in so doing also slides through pivot (38). As a result of the increased mechanical advantage of the gate opener, a motor of smaller horsepower rating may be utilized. Gate opener (20) may be used in either horizontal or vertical applications.

REFERENCES:
patent: 876166 (1908-01-01), Gard
patent: 1570483 (1926-01-01), Hammerl
patent: 2130851 (1938-09-01), Baron
patent: 3877174 (1975-04-01), McDonald

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